Codes specifying how two observations are related.
This value set has an inline code system http://hl7.org/fhir/observation-relationshiptypes, which defines the following codes:
Code
|
Display
|
Definition
|
has-member
|
Has Member |
This observation is a group observation (e.g. a battery, a panel of tests, a set of vital sign measurements) that includes the target as a member of the group. |
derived-from
|
Derived From |
The target resource (Observation or QuestionnaireResponse) is part of the information from which this observation value is derived. (e.g. calculated anion gap, Apgar score) NOTE: "derived-from" is only logical choice when referencing QuestionnaireResponse. |
sequel-to
|
Sequel To |
This observation follows the target observation (e.g. timed tests such as Glucose Tolerance Test). |
replaces
|
Replaces |
This observation replaces a previous observation (i.e. a revised value). The target observation is now obsolete. |
qualified-by
|
Qualified By |
The value of the target observation qualifies (refines) the semantics of the source observation (e.g. a lipemia measure target from a plasma measure). |
interfered-by
|
Interfered By |
The value of the target observation interferes (degrades quality, or prevents valid observation) with the semantics of the source observation (e.g. a hemolysis measure target from a plasma potassium measure which has no value). |